Troubleshooting and Maintenance
Troubleshooting
/Maintenance
Displayed when operating commands come from the keypad or there is any
problem with the communication between the keypad and inverter’s main body
in Keypad JOG mode after setting PRT-11 (Lost KPD Mode) to “0”. Set the Lost
Keypad (29) at OUT31-33.
Displayed when there is any problem with communication between the keypad
and the iS7 Control CPU (control connection cables).
Displayed when the fire function is activated. If a contact signal output is
required, set the Fire Mode (37) at OUT31-33.
7.3
Troubleshooting Fault Trips
The load is greater than the motor’s
rated capacity.
Ensure that the motor and inverter have
appropriate capacity ratings.
The set value for the overload trip
level (PRT-21) is too low.
Increase the set value for the overload trip
level.
There is a motor-load connection
problem.
Replace the motor and inverter with lower
capacity models.
The set value for the underload level
(PRT-29 and PRT-30) is less than the
system’s minimum load.
Increase the set value for the underload
level.
Acc/dec time is too short compared to
load inertia (GD2).
The inverter load is greater than the
rated capacity.
Replace the inverter with a model that has
increased capacity.
The inverter supplied an output while
the motor was idling.
Operate the inverter after the motor has
stopped or use the speed search function
(CON-60).
The mechanical brake of the motor is
operating too fast.
Check the mechanical brake.
The deceleration time is too short for
the load inertia (GD2).
Increase the deceleration time.
A generative load occurs at the
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